function addGoods() {
	var price = document.getElementById("price");
	var notInStock = document.getElementById("notInStock");
	if (notInStock.checked) {
		price.value = "";
		price.disabled = true;
		price.style.backgroundColor = "#dddddd";
	} else {
		price.value = "";
		price.disabled = false;
		price.style.backgroundColor = "#ffffff";
	}
}
